Heating-furnace.



Patented Oct. 2. |900.

C., BRANDT. HEATING FunNAcE.

(Application Bled May 25, 1900.)

2 Sheets-Sheet l.

(No Model.)

KN) N.

u] i i nc ssc s 0. o mw 2! .L c o d e t n e t a DI T. D N A R B l 7. o 97 8 5 B n N HEATING FURNACE.

(Application Bled May 25, 1900.)

2 Sheets-Sheet 2.

(N0 Model.)

Wilqasses ITED STATES PATENT OFFICE.

CARL BRANDT, OF CEDAR FALLS,v IOWA.

SPECIFICATION formingpart of Letters Patent N o. 658,907, dated October 2, 1900.

Application filed May 25, 1900. Serial No. 17,982. (No model.)

To @ZZ wiz/0m, t may concern:

Be it known' that I, CARL BRANDT, a citizen of t-he United States, residing at Cedar Falls, in the county of Black Hawk and State of Iowa, have invented a new and useful Heating-Furnace, of which the following is a speciication.

My invention is an improved heating-furnace, the object of my invention being to provide a novel form of heating-furnace which is adapted to create a downward draft directly through the fire in the tire-pot, so as to consume the smoke and effect an economy of fuel, and which is also adapted to create a direct upward draft through the fire-pot to the smokeexit at will and which is adapted for burning either hard or soft coal.

My invention consists in the peculiar construction and combination of devices hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective View of a furnace embodying my improvements.A Fig. 2 is a horizontal sectional view of the same on two planes, one

halt' of said igure being a section on a plane taken through the radiator and the other half thereof being a section taken on a plane through the dome over the fire-pot. a vertical central sectional view taken on the line or of Fig. 2. Fig. 4 is a similar view taken on the line y 'y of Fig. 2.

From the center of the circular base-ring 1 rises the ash-pit 2, which has a horizontal eX- tension 3 on one side thereof, the outer end of which is open and provided with a door 4, whereby it may be closed. The grate 5, which may be of any suitable form, is mounted and supported on a bridge-plate 6, which is transversely disposed in the ash-pit, the ends of the said bridge-plate being supported on lugs 7 in the sides of the ash-pit. a

The ash-pit is provided on its upper side with a circular opening, with which the grate is coincident, and said circular opening is surrounded by an Vannular groove 8, which is concentric therewith and is formed in the upper side of the ash pit, in which annular groove is seated the lower edge of the tire-pot 9, which in the form of my invention here shown is cylindrical and is provided in its upper edge with an annular groove 10, which Fig. Sis.

receives the lower edge of the dome 11. The dome is provided on its front side with a horizontal extension' 12, through which fuel is introduced to the lire-pot and which is provided with a door 13,wherebyit may be closed, and preferably said door is provided with an opening or series of openings 14 of usual form, provided with a draft-regulator 15. From the side of the dome opposite the extension 12 projects a smokeexit flue 16, in which is a pivoted damper 17, which is adapted to open communication between said tlueand the combustion-chamber or entirely close such communication at will.

A radiator 18, which is annular in form, as shown, is supported on the extension 12 and tlue 16 and communicates with the latter, as at 19, and said radiator is adapted, on the side Where it communicates'with said fine, for the attachment of a smoke-pipe 20. A pair of spirally disposed or inclined battles 2l are located in the radiator and divide the same into lower compartmentsor fines 22 and upper compartments or flues 23, said baflies extending from the bottom of the radiator at points opposite the opening 19\nearly to the side of said radiator opposite said opening 19, an opening 24 being formed between the upper ends of the bales, which opening 24 establishes communication between the lower and upper tlues or compartments of the radiator. An opening 25 in the side of the radiator at a point below the opening 24 permits access .to t-he interior of the radiator, whereby the lower tlues therein may be cleaned, and said opening 25 is provided with a suitable cap or closure 26. Pipes 27 communicate with the lower flues or compartments of the radiator, preferably at diametrically-opposite points, as at 28, and the lower` ends of said pipes communicate with the interior of ,the ash-pit, as at 29, at points substantially on a plane with the grate.

The operation of my invention is as follows: When the damper 17 is closed in the line 16, as shown in Fig. 4, the' draft passes downward through the fire in the tire-pot,

IOO

thence upward through the opening 24 into the upper vfines of the radiator, and'rearward therethrough to the smoke-pipe 20, the battles in the radiator thus causing the heated air and gases to pass twice substantially through the radiator, and hence securing the maximum heating results. When it becomes desi rable or necessary from any cause to secure a direct upward draft through the fire-pot, this may be readily accomplished by opening the damper 1'7, thereby establishing direct communication between the combustionchain ber and the smoke-pipe 20.

A draft-pipe 30 leads from an exterior point above the ash-pit to an opening in the top of the dome, as shown, and serves to convey air to the combustionchamber, which is heated therein and passes as a hot blast downward through the fire-pot hereinbefore described.

It will be observed by reference to the drawings that the grate 5 is placed on the bridgeplate 6 and so located that the top of the grate is in the same horizontal plane as the lower sides of the lower ends of the pipes 27, thereby leaving an air-space between the lugs and ash-pit, through which the hot-air blast is drawn downward through the fire, following the space between the lugs and ash-pit toward the pipes 27 and up through said pipes into the lower fines Aof the radiator.

It will be understood that any desired number of the pipes 27 may be used.

I do not desire to limit myself to the precise construction and arrangement of parts hereinbefore described, as modifications may he made therein without departing from the spirit of my invention, and alterations may be made in existing heating apparatus of various forms so as to apply my invention thereto.

It will he understood that in a heating apparatus in which my invention is embodied the smoke being drawn downward and caused to pass through the fire is consumed.

Having thus described my invention, I claim- 1. A furnace having a radiator communieating with the smoke-exit, ues between said radiator and the ash-pit, to create downdrafts through the combustion-chamber, a direct flue between the combustion-chamber and the smoke-exit and communicating with said radiator, a damper in said flue, and a draft-pipe leading to the top of the conibustion-chamber, to admit air thereto, substantially as described.

2. A furnace having a radiator provided with inclined baffles forming upper and lower communicating fines in the radiator, pipes to establish communication between the lower radiator-fines and the ash-pit, at a point below the grate, and said upper dues of said radiator haring a smokeexit, said furnace being further provided with a direct flue to establish communication between the combustion-chamber and said upper radiator-due, said direct flue having a damper, for the purpose set forth, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

CARL BRANDT.

Witnesses:

L. H. SEVERIN, GEO. S. MoMIN. 

